some help.. please?

[-Bee-]

Can someone please help?

Is this translation to chinese correct?

We know I was never head of the class. We know I can be a pain in the ass.(can I say that?) But there's something you don't know about me. Many days I sat in your class gratefully.Thanks.

我们知道，我从来没有首长级。我们知道，我可以是一个(pain in the ass 怎么说?)。 （我可以这么说？ ）但是有些你不知道。许多天，我坐在你班上(or maybe 课?)感激。谢谢。

[skylee]

Consider -

没有首长级 ~ 不是班長

I can be a pain in the ass ~ 我有時像一個混蛋 (sometimes I was like a pain in the ass [instead of an ass you become an egg ])

有些你不知道 ~ 你們有所不知

许多天 ~ 許多時候

I sat in your class gratefully ~ 我心懷感激地坐在你們之間 or 我對於能跟你們一起上課感到非常幸運/榮幸 (I felt very lucky/honoured to be in the same class with you)